itkRegularizedHeavisideStepFunction.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkRegularizedHeavisideStepFunction_h
#define itkRegularizedHeavisideStepFunction_h

#include "itkHeavisideStepFunctionBase.h"

namespace itk
{
template< typename TInput = float, typename TOutput = double >
class ITK_TEMPLATE_EXPORT RegularizedHeavisideStepFunction:
    public HeavisideStepFunctionBase< TInput, TOutput >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(RegularizedHeavisideStepFunction);

  using Self = RegularizedHeavisideStepFunction;
  using Superclass = HeavisideStepFunctionBase< TInput, TOutput >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  using InputType = typename Superclass::InputType;
  using OutputType = typename Superclass::OutputType;

  using RealType = typename NumericTraits< InputType >::RealType;

  void SetEpsilon(const RealType & ieps);

  itkGetConstMacro( Epsilon, RealType );
  itkGetConstMacro( OneOverEpsilon, RealType );

protected:
  RegularizedHeavisideStepFunction();
  ~RegularizedHeavisideStepFunction() override = default;

private:
  RealType m_Epsilon;
  RealType m_OneOverEpsilon;
};
}

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkRegularizedHeavisideStepFunction.hxx"
#endif

#endif